21*17 for Minelab SD / GP / GPX

Detech 21×17" S.E.F Butterfly Search Coil for Minelab and White’s Detectors

Enhance your treasure hunting with the Detech 21×17 inch S.E.F Butterfly search coil, specially designed for Minelab SD, GP, and GPX series as well as White’s TDI models. This is the largest DD coil in the S.E.F series, delivering unmatched depth, sensitivity, and precise target identification.

Unmatched Sensitivity for Gold

Experience extreme depth and sensitivity with this lightweight, high-performance coil. Ideal for detecting elusive nuggets, relics, and deep targets, it’s perfect for historical battlefields, gold-rich terrains, and challenging environments.

Designed for Great Depth

The 21×17 inch S.E.F coil goes deeper than any other in the series, making it the ultimate choice for finding gold at significant depths. Combine it with your Minelab GPX detector or White’s TDI for maximum performance.

Precision Pinpointing

Benefit from accurate pinpointing to reduce unnecessary digging and improve target detection. Every beep could lead to a valuable find, giving you confidence in every search.

Top Features

• Coil Type: DD / Double D

• Shape: Ellipse

• Size: 21×17"

• Configuration: S.E.F (Symmetrical Electromagnetic Field) – Butterfly

• Weight: Approx. 907 g

• Enhanced ground balancing and stable operation

• Coil cover included for protection

• Two-year warranty included

Compatibility

Minelab: GP3000, GP 3500, GP Extreme, GPX 4000, GPX 4500, GPX 4800, GPX 5000, SD2000, SD2100, SD2100 V2, SD2200D, SD2200D V2
White’s: TDI, TDI Pro, TDI S

Take your detecting to the next level with the Detech 21×17" S.E.F Butterfly coil – engineered for maximum depth, superior sensitivity, and reliable performance. Perfect for serious hobbyists and professional treasure hunters alike.